Digital Commons Network^™

Constraining The Surface Inhomogeneity And Settling Times Of Metals On Accreting White Dwarfs, Michael H. Montgomery, S.E. Thompson, Ted Von Hippel

Publications

Due to the short settling times of metals in DA white dwarf atmospheres, any white dwarfs with photospheric metals must be actively accreting. It is therefore natural to expect that the metals may not be deposited uniformly on the surface of the star. We present calculations showing how the temperature variations associated with white dwarf pulsations lead to an observable diagnostic of the surface metal distribution, and we show what constraints current data sets are able to provide. We also investigate the effect that time-variable accretion has on the metal abundances of different species, and we show how this can …

Promoting Teamwork: An Event-Based Approach To Simulation-Based Teamwork Training For Emergency Medicine Residents, Michael A. Rosen, Eduardo Salas, Teresa S. Wu, Salvatore Silvestri, Elizabeth H. Lazzara, Rebecca Lyons, Sally J. Weaver, Heidi B. King

Publications

The growing complexity of patient care requires that emergency physicians (EPs) master not only knowledge and procedural skills, but also the ability to effectively communicate with patients and other care providers and to coordinate patient care activities. EPs must become good team players, and consequently an emergency medicine (EM) residency program must systematically train these skills. However, because teamwork-related competencies are relatively new considerations in health care, there is a gap in the methods available to accomplish this goal. This article outlines how teamwork training for residents can be accomplished by employing simulation-based training (SBT) techniques and contributes tools and …

A Law Library Journal Centennial Timeline: Highlights From One Hundred Years Of Llj History, Frank G. Houdek

Publications

Professor Houdek provides a time line highlighting events, actions, and individuals that have played prominent roles in the nearly hundred-year history of Law Library Journal.

Feeding Behaviour Of The Columbretes Lizard Podarcis Atrata, In Relation To Isopoda (Crustaceae) Species: Ligia Italica And Armadillo Officinalis, Aurora M. Castilla, Bieke Vanhooydonck, Alessandro Catenazzi

Publications

The lizard Podarcis atrata, endemic to the Columbretes archipelago (Mediterranean, Spain) occupies very small islands characterized by extreme aridity and a reduced availability of potential insect prey. The results of an experimental study have shown that adult lizards offered individuals of Ligia italica and Armadillo officinalis (marine and terrestrial isopods, respectively) consumed at high frequencies; with males consuming them at significantly higher frequencies than females. The results are discussed in light of the importance of the inclusion of marine prey into the diet in arid insular ecosystems.

Federal Water R&D: Current Landscape, Future Goals And Emerging Technologies, Gene Whitney

Publications

No abstract provided.

The Status Of Women Faculty In Four-Year Aviation Higher Education Programs, David C. Ison

Publications

The purpose of the study was to evaluate the status of women's participation in full-time, non-engineering aviation baccalaureate programs in the United States. In addition, the involvement of women in academic aviation leadership positions (such as chair, dean, or director) was evaluated. Of 353 full-time aviation faculty members employed at 60 different aviation programs meeting the study's criteria, 36 (10.1 %) were female. Eighty faculty were identified in academic leadership positions, and of these faculty leaders, 8 (10%) were women. These participation rates were found to be slightly higher than those found among the pilot population and in the aviation …

Congressional Concerns Related To The Energy-Water Nexus, Erik Webb

Publications

No abstract provided.

Excitation Of Ducted Gravity Waves In The Lower Thermosphere By Tropospheric Sources, Jonathan B. Snively, Victor P. Pasko

Publications

Short-period, small-scale gravity waves are frequently observed in nighttime airglow imaging experiments. These waves are often found to be ducted and may be confined to a thin region of altitude in the mesosphere or lower thermosphere. An apparent paradox of high-altitude ducted waves is the nature of the source; it is necessary that a ducted wave be excited in situ or have been able to tunnel into the duct from another atmospheric region. In this paper, analytical and numerical solutions are presented for simple thermally ducted gravity waves that are Doppler-shifted by constant background winds. Using a continuous analytical model, …

Guidance For Private Property Owners: Steps And Alternatives For Disposal Of Material Dredged From River And Harbors Of Casco Bay, Normandeau Associates, The Environment Company

Publications

The overall goal of the project is to help private owners navigate the dredging/disposal process and make informed decisions that are:

• Cost effective (including all steps of the process);
• In compliance with regulations; and
• Geared to specific needs (material volume, sediment type and level of contamination).

As part of this objective, we have attempted to do the following:

1. Describe the regulatory process for disposal alternatives (upland, ocean, and others) in simple but accurate terms.
2. Develop a complete list of disposal alternatives.
3. Develop a comprehensive alternatives analysis for possible disposal alternatives and screening process.
4. Develop a resource compendium in an appendix, …

Secondary Metabolism Inducing Treatments During In Vitro Development Of Turmeric (Curcuma Longa L.) Rhizomes, Matthew M. Cousins, Jeffrey W. Adelberg, Feng Chen, James Rieck

Publications

Turmeric (Curcuma longa L.) plants that were grown in vitro for 17 or 22 weeks as a fed-batch culture in 2.5 L vessels yielded 39 to 43 g and 62 to 70 g of fresh rhizomes per vessel, respectively (95 % confidence interval). The MS liquid medium was maintained at 6 % sucrose through media addition twice during the experiment. Various methods were employed in attempts to increase secondary metabolism. Antioxidant and total phenolics assays were employed to characterize phytochemical activity. A first experiment exposed four clones to phenylalanine and/or methyl jasmonate (MeJa) from week 12 to 17 in …

Assessing The U.S. Watershed Management Movement: National Trends And An Illinois Case Study, Leslie Duram, Tim Loftus, Jane Adams, Christopher Lant, Steven E. Kraft

Publications

Local watershed planning is an increasingly important component of environmental management. This article provides an overview of local watershed management efforts occurring across the US and then focuses on one case study from southern Illinois. First, analysis of 1145 local watershed groups shows that government agencies, farmers, and rural residents are key stakeholders in local groups that primarily deal with regional environmental stressors in the form of soil erosion, nutrients, and agrichemicals. Second, the role of watershed partnerships in mediating the complex interactions among stakeholders and local water resources are investigated through a case study of one watershed group. The …

The First Mid-Infrared Spectra Of Cool White Dwarfs, Mukremin Kilic, Ted Von Hippel, Et Al.

Publications

We present the first mid-infrared spectra of two cool white dwarfs obtained with the Spitzer Space Telescope. We also present 3.5–8 μ m photometry for 19 cool white dwarfs with 5000 K ≤T_eff ≤ 9000 K. We perform a detailed model atmosphere analysis of these white dwarfs by fitting their UBVRIJHK and Spitzer photometry with state-of-the-art model atmospheres, and demonstrate that the optical and infrared spectral energy distributions of cool white dwarfs are well reproduced by our grid of models. Our mid-infrared photometry and 7.5-14.5 μm spectrum of WD 0018–267 are consistent with a T_eff = 5720 …

Dynamically And Statistically Downscaled Seasonal Temperature And Precipitation Hindcast Ensembles For The Southeastern Usa, Justin T. Schoof, D. W. Shin, S. Cocke, T. E. Larow, Y-K. Lim, J. J. O'Brien

Publications

We present results from a 15-year 10-member warm season (March–September) hindcast ensemble of maximum and minimum surface air temperatures and precipitation in southeast USA. The hindcasts are derived from the Florida State University/Center for Ocean-Atmospheric Prediction Studies Global Spectral Model (FSU/COAPS GSM) and downscaled using both the FSU/COAPS Nested Regional Spectral Model (NRSM) and a statistical downscaling method based on stochastic weather generator techniques. We additionally consider statistical bias correction of the dynamical model output. Basic descriptive statistics indicate that the bias-corrected and statistically downscaled data reduce the FSU/COAPS GSM bias considerably in terms of basic climatology. Statistics describing the …

Hypoelastic Modeling Of Reinforced Concrete Walls, Mohsen A. Shayanfar, Amir Safiey

Publications

This paper presents a new hypoelasticity model which was implemented in a nonlinear finite element formulation to analyze reinforced concrete (RC) structures. The model includes a new hypoelasticity constitutive relationship utilizing the rotation of material axis through successive iterations. The model can account for high nonlinearity of the stress-strain behavior of the concrete in the pre-peak regime, the softening behavior of the concrete in the post-peak regime and the irrecoverable volume dilatation at high levels of compressive load. This research introduces the modified version of the common application orthotropic stress-strain relation developed by Darwin and Pecknold. It is endeavored not …

An Application Of High Fidelity Ftds For Ab Initio Pilot Training: The Way Ahead, Nickolas D. Macchiarella, Tim Brady, Brandon S. Lyon

Publications

"Decreases in simulation costs and increases in aircraft training costs led to the need for further investigation into the application of simulation-based training. Researchers conducted an eighteen-month study using ab initio student pilots as participants. This study applied a Federal Aviation Administration (FAA) approved, Part 142, flight-training curriculum that included 60% flight training device (FTD) use. Researchers identified five causal factors that warranted further investigation. The causal factors identified were visual fidelity, procedural similarity, dynamic flight environment, difficulty of task, and visual scanning and response. These causal factors have the potential to affect transfer of training (ToT) from simulated flight …

Gis Forest Inventory And Evaluation In The Wake Of Climate Change, Mary Snow, Richard K. Snow

Publications

"Because climate and vegetation are so strongly associated, it is assumed that the forecast rapid changes in climate will affect plant distributions and alter the makeup of forest communities. For example, climate change could cause regional wind patterns to shift, which would be accompanied by an increase in wind speed intensity. Such shifts could impact existing rain shadow effects in some regions causing more precipitation on the windward side of mountain ranges while creating even drier conditions on the leeward sides. Fire patterns are likely to be altered as well, which could affect a variety of plant species, even those …

Uaa Student Showcase Journal: Recognizing Excellence (2008), N/A N/A

Publications

No abstract provided.

Fiber Bundle Description Of Flow And Nonlinear Hydrodynamics On Circles, Andrei Ludu

Publications

We introduce a differential geometry description of the path lines, stream lines and particles contours in hydrodynamics. We present a generalized form of a Korteweg-de Vries type of equation for the exterior of a circle. Nonlinearities from the boundary conditions, surface tension and the Euler equations are taken into account, but the flow is considered inviscid and irrotational. For the circular case we describe the traveling waves shapes, solitons and the particles trajectories.

Marine Science Assessment Of Capture-Based Tuna (Thunnus Orientalis) Aquaculture In The Ensenada Region Of Northern Baja California, Mexico, José A. Zertuche-González, Oscar Sosa-Nishizaki, Juan G. Vaca Rodriguez, Raul Del Moral Simanek, Charles Yarish, Barry A. Costa-Pierce

Publications

Final Report of the Binational Scientific Team to the Packard Foundation.

Put It In Writing, Eric C. Shoaf

Publications

The article offers instructions for authors and contributors on how to send their manuscripts of scholarly research to be published in the Library Administration & Management (LA&M).

Hot Politics: The Politics Behind Global Climate Change - Talking Points, Derek Wilmott

Publications

As the U.S. presidential campaign heats up, so do the issues surrounding global warming. This FRONTLINE film explores the politics behind global warming, from the three previous U.S. presidential administrations to the United Nation's Intergovernmental Panel on Climate Change.

This documentary also examines the well-financed energy industry campaign that challenged the broad scientific consensus on the human causes of climate change in an effort to stall federal regulation.

Short-Term And Long-Term Time Course Studies Of Turmeric (Curcuma Longa L.) Microrhizome Development In Vitro, Jeffrey Adelberg, Matthew M. Cousins

Publications

Turmeric (Curcuma longa L.) plantlets were cultured in MS (Murashige and Skoog Physiol Plant 15:473–497, 1962) liquid medium with 6% sucrose. Microrhizome development was observed in the presence of methyl jasmonate (MeJa) (0, 5 and 16 μM) and benzyladenine (BA) (0, 0.32 and 1 μM). Leaf, root, rhizome growth, and sugar use were measured weekly for 6 weeks in small vessels (180 ml) and four times in 23 weeks in larger vessels (2.5 l). MeJa reduced leaf, root, and rhizome biomass. BA had a positive effect on biomass accumulation. Microrhizome mass increased at a linear rate during 6 weeks …

Capacity Planning Of A Commodity Cluster In An Academic Environment: A Case Study, Linh B. Ngo, Amy W. Apon, Baochuan Lu, Hung Bui, Nathan Hamm, Larry Dowdy, Doug Hoffman, Denny Brewer

Publications

In this paper, the design of a simulation model for evaluating two alternative supercomputer configurations in an academic environment is presented. The workload is analyzed and modeled, and its effect on the relative performance of both systems is studied. The Integrated Capacity Planning Environment (ICPE) toolkit, developed for commodity cluster capacity planning, is successfully applied to the target environment. The ICPE is a tool for workload modeling, simulation modeling, and what-if analysis. A new characterization strategy is applied to the workload to more accurately model commodity cluster work- loads. Through "what-if" analysis, the sensitivity of the baseline system performance to …

Understanding And Predicting Ecological Dynamics: Are Major Surprises Inevitable?, Daniel F Doak, James A Estes, Benjamin S Halpern, Ute Jacob, David R Lindberg, James Lovvorn, Daniel H Monson, M Timothy Tinker, Terrie M Williams, J Timothy Wootton, Ian Carroll, Mark Emmerson, Fiorenza Micheli, Mark Novak

Publications

Ecological surprises, substantial and unanticipated changes in the abundance of one or more species that result from previously unsuspected processes, are a common outcome of both experiments and observations in community and population ecology. Here, we give examples of such surprises along with the results of a survey of well-established field ecologists, most of whom have encountered one or more surprises over the course of their careers. Truly surprising results are common enough to require their consideration in any reasonable effort to characterize nature and manage natural resources. We classify surprises as dynamic-, pattern-, or intervention-based, and we speculate on …

A Quantitative Magnetic Resonance Imaging Analysis Of The Cerebellar Deficit Hypothesis Of Dyslexia, Michelle Y. Kibby, Jill B. Fancher, Rochelle Markanen, George W. Hynd

Publications

Recent work by Nicolson and Fawcett suggests the primary source of dysfunction in dyslexia is the cerebellum. In order to examine the cerebellar deficit hypothesis of dyslexia, 20 children with dyslexia (11 had co-morbid ADHD) and 20 without dyslexia (11 had ADHD, 9 were typically developing controls) were assessed with neuropsychological testing and quantitative MRI. Results demonstrated that volumes of both hemispheres and the vermis were not significantly different between groups (ps > .10). However, children without dyslexia demonstrated greater rightward cerebellar hemisphere asymmetry compared to children with dyslexia, F(1,33) = 4.09, p < .05. In addition, children with ADHD only were more comparable to controls in cerebellar asymmetry (none had reversed asymmetry); whereas those with co-morbid dyslexia and ADHD were more comparable to those with dyslexia. The relationship between cerebellar morphology and phonological processing also was assessed. For those without dyslexia, bilateral hemisphere volume moderately correlated with phonological awareness and phonological short-term memory (ps < .05); hemisphere asymmetry moderately correlated with rapid naming errors (p.10), anterior vermis volume was moderately correlated with inattention, hyperactivity and impulsivity (ps < .05) and right hemisphere volume was moderately correlated with inattention and hyperactivity (ps < .05). Overall, our findings provide mixed support for the cerebellar deficit hypothesis of dyslexia. Although cerebellum morphology is atypical in some individuals with dyslexia, cerebellar morphology does not appear to be related to cognitive or motor dysfunction consistently. In our sample, cerebellum morphology may be related to about a third of our cases of dyslexia. Hence, dyslexia may be best accounted for by a combination of cortical and cerebellar contributions.

Markov Chain Monte Carlo Estimation Of Normal Ogive Irt Models In Matlab, Yanyan Sheng

Publications

Modeling the interaction between persons and items at the item level for binary response data, item response theory (IRT) models have been found useful in a wide variety of applications in various fields. This paper provides the requisite information and description of software that implements the Gibbs sampling procedures for the one-, two- and three-parameter normal ogive models. The software developed is written in the MATLAB package IRTuno. The package is flexible enough to allow a user the choice to simulate binary response data, set the number of total or burn-in iterations, specify starting values or prior distributions for model …

Phase Transitions And Magnetoresistance In Ni50mn50−Xinx Heusler Alloys, Arjun K. Pathak, Bhoj Raj Gautam, Igor Dubenko, Mahmud Khan, Shane Stadler, Naushad Ali

Publications

The phase transitions and magnetoresistance in polycrystalline ferromagnetic Ni₅₀Mn_50−xIn_x (15 ≤ x ≤ 16.2) Heusler alloys were studied through ac susceptibility, magnetization, thermal expansion, and resistivity measurements in the temperature interval of 5–400 K. The temperatures of the martensitic transformations were found to be strongly dependent on In concentration and on the strength of the applied external magnetic field. We observed large magnetoresistance (MR) Δρ/ρ_o ≈ −80% for x = 16 at T ≈ 125 K and Δρ/ρ_o ≈ −56% for x = 15 at T …

A New Look At The Local White Dwarf Population, J. B. Holberg, E. M. Sion, Terry D. Oswalt, G. P. Mccook, S. Foran, John P. Subasavage

Publications

We have conducted a detailed new survey of the local population of white dwarfs lying within 20 pc of the Sun. A new revised catalog of local white dwarfs containing 122 entries (126 individual degenerate stars) is presented. This list contains 27 white dwarfs not included in a previous list from 2002, as well as new and recently published trigonometric parallaxes. In several cases new members of the local white dwarf population have come to light through accurate photometric distance estimates. In addition, a suspected new double degenerate system (WD 0423+120) has been identified. The 20 pc sample is currently …

Selection Of The Spraying Technologies For Over-Coating Of Metal-Stampings With Thermo-Plastics For Use In Direct-Adhesion Polymer Metal Hybrid Load-Bearing Components, M. Grujicic, V. Sellappan, Laine Mears, Norbert Seyr, Andreas Obieglo, Marc Erdmann, Jochen Holzleitner

Publications

The suitability of various polymer-powder spraying technologies for coating of metal-stampings used in polymer metal hybrid (PMH) load-bearing automotive-component applications is considered. The suitability of the spraying technologies is assessed with respect to a need for metal-stamping surface preparation/treatment, their ability to deposit the polymeric material without significant material degradation, the ability to selectively overcoat the metal-stamping, the resulting magnitude of the polymer-to-metal adhesion strength, durability of the polymer/metal bond with respect to prolonged exposure to high-temperature/high-humidity and mechanical/thermal fatigue service conditions, and compatibility with the automotive body-in-white (BIW) manufacturing process chain. The analysis revealed that while each of the …

A New Approach For Nonlinear Finite Element Analysis Of Reinforced Concrete Structures With Corroded Reinforcements, Mohsen A. Shayanfar, Amir Safiey

Publications

A new approach for nonlinear finite element analysis of corroded reinforcements in reinforced concrete (RC) structures is elaborated in the article. An algorithmic procedure for producing the tension-stiffening curve of

RC elements taking into consideration most of effective parameters, e.g.: the rate of steel bar corrosion, bond-slip behavior, concrete cover and amount of reinforcement, is illustrated. This has been established on both experimental and analytical bases. This algorithm is implemented into a nonlinear finite element analysis program. The abilities of the resulted program have been studied by modeling some experimental specimens showing a reasonable agreement between the analytical and experimental …